<?php

namespace Aws\S3;

use Aws\Credentials\CredentialsInterface;
use GuzzleHttp\Psr7\Uri;

/**
 * @deprecated
 */
class PostObject {
	private $client;
	private $bucket;
	private $formAttributes;
	private $formInputs;
	private $jsonPolicy;

	/**
	 * Constructs the PostObject.
	 *
	 * @param S3ClientInterface $client Client used with the POST object
	 * @param string $bucket Bucket to use
	 * @param array $formInputs Associative array of form input
	 *                                      fields.
	 * @param string|array $jsonPolicy JSON encoded POST policy document.
	 *                                      The policy will be base64 encoded
	 *                                      and applied to the form on your
	 *                                      behalf.
	 */
	public function __construct(
		S3ClientInterface $client,
		                  $bucket,
		array             $formInputs,
		                  $jsonPolicy
	) {
		$this->client = $client;
		$this->bucket = $bucket;

		if(is_array($jsonPolicy)) {
			$jsonPolicy = json_encode($jsonPolicy);
		}

		$this->jsonPolicy = $jsonPolicy;
		$this->formAttributes = [
			'action' => $this->generateUri(),
			'method' => 'POST',
			'enctype' => 'multipart/form-data'
		];

		$this->formInputs = $formInputs + ['key' => '${filename}'];
		$credentials = $client->getCredentials()->wait();
		$this->formInputs += $this->getPolicyAndSignature($credentials);
	}

	/**
	 * Gets the S3 client.
	 *
	 * @return S3ClientInterface
	 */
	public function getClient() {
		return $this->client;
	}

	/**
	 * Gets the bucket name.
	 *
	 * @return string
	 */
	public function getBucket() {
		return $this->bucket;
	}

	/**
	 * Gets the form attributes as an array.
	 *
	 * @return array
	 */
	public function getFormAttributes() {
		return $this->formAttributes;
	}

	/**
	 * Set a form attribute.
	 *
	 * @param string $attribute Form attribute to set.
	 * @param string $value Value to set.
	 */
	public function setFormAttribute($attribute, $value) {
		$this->formAttributes[$attribute] = $value;
	}

	/**
	 * Gets the form inputs as an array.
	 *
	 * @return array
	 */
	public function getFormInputs() {
		return $this->formInputs;
	}

	/**
	 * Set a form input.
	 *
	 * @param string $field Field name to set
	 * @param string $value Value to set.
	 */
	public function setFormInput($field, $value) {
		$this->formInputs[$field] = $value;
	}

	/**
	 * Gets the raw JSON policy.
	 *
	 * @return string
	 */
	public function getJsonPolicy() {
		return $this->jsonPolicy;
	}

	private function generateUri() {
		$uri = new Uri($this->client->getEndpoint());

		if($this->client->getConfig('use_path_style_endpoint') === true
			|| ($uri->getScheme() === 'https'
				&& strpos($this->bucket, '.') !== false)
		) {
			// Use path-style URLs
			$uri = $uri->withPath("/{$this->bucket}");
		} else {
			// Use virtual-style URLs
			$uri = $uri->withHost($this->bucket.'.'.$uri->getHost());
		}

		return (string)$uri;
	}

	protected function getPolicyAndSignature(CredentialsInterface $creds) {
		$jsonPolicy64 = base64_encode($this->jsonPolicy);

		return [
			'AWSAccessKeyId' => $creds->getAccessKeyId(),
			'policy' => $jsonPolicy64,
			'signature' => base64_encode(hash_hmac(
				'sha1',
				$jsonPolicy64,
				$creds->getSecretKey(),
				true
			))
		];
	}
}
